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Dec. 20, 1927. 1,653,345

I T. R. COOK ETAL V I SAFETY MINE HOIST Filed April 1927 3 Sheets-Sheet 1 Sum/1mm QDH M flaw/140 M SM/nq Dec. 20, 1927.

T. R. COOK ET AL SAFETY MINE HOIST Filed April 21. 1927 3 Sheets-Sheet 2 Witness eo Dec. 2 o, 1927.

T. R. COOK ET AL SAFETY MINE HOIST Filed April 1927 3 Sheets-Sheet 3 Witness I W ammo fi/OMAS fl. Coo/r flow/v40 IV SMITH Cldoonoqo Patented Dec. 20, 1927.

unir nqisTM31125;

PATENT oEF c- THOMAS R; COOK AND DONALD NFSMITH; OF SQRANTON, PENNSYLVANIA, ASSIGNORS TO THE 'HUDSOITCOAL COMPANY. :OF'SCRANTON, PENNSYLVANIA. I I

Application iiledjAprl l gli, lllz l er lalljl\loi 1858B. 1 v

n11 extensively used type of imin e hoifi embodying. a safety mechanism k'now njf as"; the: Boyer overwindrii is provided? automatic means to" prevent execs"s'ifw e'jsipeed of the hoist eitherwhen hoistingficoalgbr when hoisting men, and'embodies automatic means lto prevent travel of the hoi's't the coal landing when 'hoi'sting'gcoal' forf past the man landing wirenthotmmgmn;

These means embody':'first, a control inein ber active, to both close the throttle "of th ee ies n a d pp y] br es 9 an actuator for said control mmbegane third, a ball gover ogitorment-g saidae mater i tawjm d said Conner; me e fprop'o'rl-f tion ately' tyitliincrease of the hoist? speed, The 1 actuator strikes 'f and 'oper ate'sf thecontroljmember when'fithe' tw'o are relatively oved s'ufiiciently a; permimna such 'er; M e 6f he ne- 11 i mbe s es? i t ttle closing'andbrake application; The operation of pa ts is unerring whenj' th e hoist ating at coal speed and,bitgnfiwh n'nro ing more slowly' for hoisting men, I buti if the'r'n'an speed is slower than a jpre'determinedi "speed as; the cage I nearsi'the 'landiiigf f tvhich reduced speed" may: still b'fa' dangerous s" ejcl at which to land'th'e cage 'on theians'); governor balls do not ove sufiicientlyfli'fi'der ciitrifugalforceflo 'shiftt i coeoperzitivef rela't' her and hehee' autoniatic sl' p g 7 the icninn t' e i 'ediaith t hioy wind will be revented the u'siial i s'jth'e; primary object'flof.jour jiriyentio i overcome thisQbjeoti n the pai' i'sian means, independent. of the ball governor, for positively moving the actuator toward the control member to a predetermined position; as nearlanding moyement of the hoist takes place, and saidposition' suchtl iat striking offth control memberby the 'actiiat'oriis in surcdi 'should the engineer fail {toslowthe hoist at the man landing; Th'usQunderfshoh circumstances the hoist would be automatiman 'spe' e'df" Then, upbn loading of the cage. thecage" aden-signals forthe engineer-to oistiii'g operation, but it sometimes happens tliatftheengineer fails to condition the" o stlf or man" speed, placing the occu-V pantsiinqeopardy. his a furtheraim of on; invention "tofp'revent this; by placing th'e m n-s'ped conditioning means and the enginefls signalling means under a common controliifThus; as hesignals; to the cage loader:hisfunderstandinythat men are to be hoisted; is constrained to nditi 1??? hoist or relatively slow speed and c for St atthem'anlanding;

tltthe foregoing i'n view,'the invenl iS t front elevation illustrating the I iKoyer" overtlvindv improved in: accordance l in: l iii ention', parts being in section; 1g. lis a vertical sectional view'sub stant ial ylq iie'2% 2 Fi i F g; 3 is a fragmentary horizontal section,

e 2 3i .L F w y .7 5 1 1 1? a it 13 i numerals 5 designate twofvertica'l stands Wlil 11:l;1pp0t"2i pair of horizontally disposed, 'rot atable tables '6 Worms such as Tot 2 ,1 engage worm teeth at the periphyrsqsnat s; Byappropriate gearing 9, these shafts are connected'i'vith a pair of hfliyeishafts" 110 having sprockets 11, these sprockets being adapted for connection by yith" t he usual'sprockets of the hoisting' engine. One of these last named sprockets is secured against movement with respect to its carrying shaft and the drum keyed to the shaft. This sprocket may be keyed to theshaft or bolted to the keyed drum, the effect will be the same. For the clntcheddrum, thesprocket must be preferably bolted to the drum or other suitable connection tothe drum made, such, that the rotation of the sprocket conforms to the loose or clutched drum. Any slippage of the shafts 8 andassociated parts with re speot to each other, gives an alarm through I tables 6 ar a pro ded W tlii cQ'a the instrumentality of a slip-indicating switch 42 (Fig. 1) forming no part of the present invention.

Each stand 5 carries a control member 13 for the hoist, said member being connected with the upper end of a shaft 14- This shaft and control member form parts of the customary mechanism for automatically closing the throttle of the hoisting en inc and applying brakes, when said mern er 13 is horizontally turned. 15 denotes a rotary actuator for the, control member 13, said actuator being commonly in the form of a pin disk, whose pin '16 is. adapted to strike the control member 143 and turn it her.- izontally, under certain conditions. One of thes ac ua ors 15 is, of urse rovided for each of the control members 3,"and for moving these actuators toward the control member- 13, proportionately with hoist speed increase, two ball governors 17' areprovijded, driven by appropriate gearing 18. from the shafts 1 Whenever the hoist runs at a. sufficiently excessive spced'to cause either governor 17 to lower the corresponding actuator 15 suffiCiently to cause its'fpin' '16 to strike the subjacent control -inember 13,.the atter is u ned, au oma ically lqsi igth'e throttle of the hoistingen'gine and a ply inglthe brakes. v

eans are provided, embodying the'tables o aising-the con ol membe s. 13 a d causing actuation thereof by the actuators 15, in case the engineer shouldfitailftojstop he hoist at he predetermined; landi'ii'gi Lever-s19 are disposed one abeye eacliftable 6 and are fulcrumed at one end, to Stationary posts 20 at the centers of-said table's, while the other ends of these levers aresujftably connected at 21 with theleontl to'l members-13,. a h of hese e ers earnest shoejfi co an y k own as a w l. nead-i e tbs I 4 i l cam 23 for co-operati'on \v"i.tl1- peed dogn cas the sn gins ii'dq w tak tep to op th hpistjatthgjpze an; ned @0 1 ead ng, cam 23 ni mao 0r shoe 22, thereby swinging the level-"19 p a y n isp ing, he control member 13 in the path of the pin 16 ontlieactuator 15. Thus, the pin strikes the controlmember and turns it, thereby stopping theengineand applying the brakes.

Pivotally mounted upon each lever 19, is a second shoe or man speed dog 24, and when the hoist is set for hoisting coal, these two dogs or shoes 21 are su' m'gnpwardly to some extent as indicated in Fig. 1, said dogs or shoes then being disposed above ram.- -33 which are provided on the tables 6 for their actuation. 'lhe cams are somewhat higher than lilt cams 23, and when the dogs or hoes 24 11H, swung downwardl t0 the position of Fig. 4, said (logs or shoes are positioned in the paths of the cams This downward swinging of the dogs or shoes 24 is, effected when menare to be hoisted instead of coal. Thus, if the engineer does not take steps to stop the hoist as the man landing-is neared, thecam 25 will engage and raise. the shoe. .or dog 24, thus correspondingly raising the lever 19. This raising movement of the lever 19 is greater than that which is imparted to it by the cam 23 and the shoe or coal speed dog 22, and hence said lever 19 will raisethe control member 13 to a greater extent than the lat ter could be raised by said parts 22 and 23. Thug if the hoist be running at a suliiciently great speed, the pin 16 of the actuator 15 will Strike the control member 13 as soon as the l tter is ra ed by he le r t Shoe 24 and, tliecam How e it t he pensi ha't he approach ng h n langing, thefhpist is being run so slowly that the overnors Ufcannot act to downwardly force. the actuators 15 suiliciently to bring their pins 16 into co-operative relation with the control members 13. Nevertheless, even this reduced seed may be. such as to make. the landing oi the cage on'the usual fans, an operation hazardous to the cage occupants. Due to the nature of our invention ho e er, the. page: runn ng o ea h duced speed justj referred to, will have its tra ll 'autonnitieally checked, forcing the hoist operator to take proper steps for landing-gen ly. upea ths' an Over'iwind of the hoist is prevented by the por ion .25? .of 5- If. th ag ar past thefinanllandiiig, h s. am i o fects raisinggof the control mem er 13' into the atent-th l ..=1n j ags ep n is fectedjDis bsecl. abov -e c t le. s a. secon levergdhavink i p'e'rative connect on a 27 w hal cbll ii ilfiii hioh.r sts on th c r .15 Awash 2 uitably, ec re to he an is prti iileilffoicea hIotthe l e1:s 2,6, an te eiev i-sim uie -unieti o the pos s as, in.-

dicatedat. 3Q; "Each fitter. 26- is provided .with neanspsnch asithe Weight 31 for urging'itfin, a downward d ection, to depr the assoc ated. tuato I t a p det rmine position, at which position the actuator pin {must necessarily- St Tikethe control meniber13, ,whenraisingof the latter is eti'ected by engagement of cam 25with shoe 24. Means howevei', are provided for holding the lever. 26 against action under the influence of the weight 31, during the greater part of. the hoist travel, This means embodms :1 post 32 appropriatel connected at 33 with the lever 26. a roller or other suitable shoe 3} on the lower end of said post, and an arcuate track 35 carried by the table 6 for co-action with said shoe 34.

\Vhen operating at coal speed, the lever 26 is so supported that the shoe 24 is then clear of the track However. provision in ftlie position of .4. a m n is se 2, the shoe "and the ease -ge "Pit e m tin he 1 this bid stiiaievr'ee against "U f f l lfi l h 3 "hogs r h"**- a,:nearthe track he rs i the 2.; v t t t control member ,v speedgfof the hoist farther {lower the e the control memao 1 H ottlei and applying the bra e 9.1116 the e in er k to sto thehc'iistf'at"theman m. 5i*'ii l.' m e he Sh 24 f9 .thusfiiioyingfthe control immediatelyi waep th of the "p1n said con- 'thejh t'to a stand- .'ei e ef itt o the? o1 jg aftf'sucli afslowfspeed it yt 'ith.,f elfeeieieorffl' m pressiii'gf the" faltuator l5 "g'intd co-operative relation fwitli the control ineinljer 13, when near laii'ding movement of the hoist takes place, the lever ,26 and associated parts will is uch depress ion"and insure proper automatic cut ofi under" circumstances .11 quiring such" stopping of the hoist I L D he present showing, abrace link 36 is providedforeach post32','and eachofthese 50 links 'i'sfpivoted to a post 3'l suitably carried by a part bf the stand 5.

I, R; ick abl'yj mounted above the tables 6," is ifsha'ft .38, the bearings 39 of'thisshaft being preferably secured to a horizontal bar 40, the latter being in turn secured to the usual posts 41 which support the dial 42, the latter being of custom ary construction and c o operating in the usual way with the cage travel pointers 43. The shaft 38 is provided with two'crank arms 44 which are connected by links 45 with other crank arms 46 on shafts which carry the'shoes or niairspeed dogs24. The shaft 38 is also provided with acrank arm 48 to which a rod 49is connected. The arms 44 and the arm '48, together with the shaft 38, constitute bell cranks for operating the links 45. .Suspending links 50 are provided for the two'levers 26, the upper'ends of these links being pivoted to the arms 44, while the lower ends of said links have pin and slot connections 51 with said levers 26. \Vhen the hoist is set for handling coal, as seen in full lines in Fig. 2, the links 50 support both levers 26, -their shoes 34 being then a trifle above the tracks However, when rod 49 is moved to effect actuation of the links for thepurpose of lowering the shoes or man speed dogs 24, conditioning the hoist forhandlingmen instead of coal, the links immediately free the levers-26 as will be clear f rdrrfFigf lQ "Thus, these levers may act-un'der the influence of the weights 31-, to-efiect' lowering-of the actuators 15, when the near-landing movementof the hoist takes place, as previously described.

@Abell crank 52 whichmay well be'appropriately mounted upon one of the posts 41, is connected with the lower end of the rod 49fand by means of a rod '53, this bell crank is connected with another-"bell crank 54. This bell crank 54 is connected by a rod 55 with an engineers control lever 55 which may beset'at' either coal speed position or man speedposition'and may be held at the proper setting by'means of an appropriate dog '56"andsegment 574' 'When lever 55 is in the full line position of Fig. 2, setting ofthe' hoistfor handling coal is effected, butuhovementf'of 'said lever to the dotted linepOsit'iOn' ofFig. 2,'immecliately conditionstheentirejmechanism for hoisting men. men are-tobe: hoisted, the cage Ioader Signals this fa'ct to the engineer. Theng' 'the engineer is supposed to returnsignal to 't-he-cage loader that he understands that men are to be hoisted, and he is then supposed to set the hoist for man speed. 'Withthe ordinary types of safety hoists, however, the engineer sometimes inadvert- 'ently-fails to set the mechanism for hoisting men and hence the lives of the cage occupants are placed in jeopardy. Our invention however, provides means whereby such an occurrence cannot-happen, as provision is made 'whereby operation of the lever 55 simultaneously sets the mechanism for hoisting'men and signals to the cage loader, the engineers understanding of the fact that men are to be handled. In the present embodiment of'the invention. we have shown a signalling switch 58 connected by a link 59 with the bell crank 54, said switch forming partof the engineers signalling means to the cage loader. 1 The signal proper is diagrammatically shown at 60,'wiring 61 is indicated between the switch and the signal, and 62 designates a battery in said wiring. \Vhen lever 55 is set at coal speed position (full lines Fig. 2), the switch 58 remains open. However, when the cage loader signals to the engineer that men are to be hoisted, the engineer moves the-lever 5a to the dotted line position of Fig. 2, and in so doing, he not only operates the switch 58 to return-signal to the cage loader, but be simultaneously actuates the parts connected with said lever, to efl'ect lowering of the man speed dogs or shoes 24,.and to effect release of the levers 26 from the sus; pending links 5 0,vcausin-g said levers to be supported by their shoes 34 and the tracks 35, so that at the proper time, said tracks may permit the levers 26 to drop, lowering the actuators 15, for the purpose hereiribefore described.

It will be seen from the foregoing that distinct. improvements have! been made, over he safety min h i e heretofor in exist ence. Moreover, it will be clear to those skilled in the art that while certain specific features of construction a-nd relation of parts have been disclosed for c rrying out the lQSired ends like invention is lbiect to numerous modi cation s. Hence, the pres.- ent disclosure is to be considered wi narily asillu strative,rather than limiting;

We cla 1. In atsafety minehoist having a control me b o i ct st smpni r na for said control member normally spaced from the latter, speed-responsive means for moving said actuator towardsaid control member proportionately with hoist, speed increase, and n eansfor automatically moving said control member toward saidactuator during the near-landing. movementof the hoist: means independentof said, spee l ;;responsive. means, for movingsaid actuator toward said control .memher ton ,predeterm ned P tion during the-. io p aid-neerr landing movement. 7 I

a. in a-Hsafe y. m ne, iQisbJiaving-a ontrol member to efi'ect hoistwslgopping' g fifi llator for said: contro.l-..,nie nber normally spaced from the latter,; speed-responsive means for moving said actuatontowaagd "said control mon'iber, proportionately; with speed increase, anglnransfor automatically niovin; said control inember ,toward said actuator during the near landingmovement ot' the hoist; means independentofi said speed-responsive means for automatically moving said actuator toward said control member to a predetermintal position during 1h aforesaid near-landing movement.

1. In a safety mine. hoist having a control member to effect hoist-stopping, an actuator for said control member, speed-responsive means for moving said actuator toward said control member proportionately with hoist speed increase. and means, embod vin; a driven table. for automatically moving said control member toward said actuator during the landingapproaching movement of the was hoist; means independent, of said speed-responsive means for moving said actuator toward said control member to a predetermined position, and means governed by the aforesaid table for bringing said independent actuator-moving means into play when the near-landing movement of the hoist takes; place.

4;. In a safety mine hoisthaving a control member to'efi'ect hoist-stop nng, an actuator for said control member, speed-responsive means for moving said actuator toward said control member proportionately with hoist speed increase, and means, embodying a driven table, for automatically moving said ontro member toward said actuator during the rancling-a-pp qaclimg movement of the l-ois't; ean'js ndepende t of said spjeechrespon'siv'e means for moving said actuator towfard said control member to a predetern'iined position, and means, embodying a track on, said table, for holding said inde pendent z-ictulator-inoving 163115 against ac' 'on until the near-landing movement, of the hoist taltfes place.

In a afety mineo h v g a con o member to etfe'ct hoist-stopping, an actuatorfor said control member, speed-responsive means for moving said actuator'towai'd Said control inen l iei' proportionately with hoist speed increase, and means, embodying a driven table. for autor'natically moving said control memb r toward said actuator during the'landingapproachin-g movement of the hoist; a lever operz'iti'vely connected with ',an.l actuator and provided with; means urgnigrt in a'direc-tioh to shift the actuator to- \iiard-tlie control member, :1 Shoe carried by aid lever, and atrack carried by the atom s d table ndj ng geabte' with said shoe to liotlsti d le er a'ci i st nioi'ement ndei t e n iieiice of said urging means until the neaifl-landing movementof the hoist takes I. a

('6, In a safety mine hoist having a control member to elfect l'ioist-stopping, an actuator for said control member, speedres'ponsive means for' moving'said actuator towardsaid control nen ber proportionately with hoist speed increase, and means for moving said control member toward said actuator during near-landing movement of the hoist; means independent of said speed-responsive means for moving said actuator toward said co tr member during said near-landing movement of the hoist. and means for simultaneously placing said control-member-moving-means and said independent actuator-moving means in condition to function. I

7. In a safety mine hoist having a con trol member to effect hoist-stopping. an actuator for said control member. spr g d ro sponsive means for moving said actuator to.- ward said control member proportionalcly with hoist speed increase, and means, car

bodying a driven table, for automatically moving said control member toward said actuator during the landing-approaching movement of the hoist; a lever connected with said actuator and provided with means urging it to move in a direction to shift the actuator toward the control member, a shoe carried by said lever, a track carried by said table for engagement with said shoe to hold said lever against movement under the influence of said urging means until the near-landing movement of the hoist takes place, and means for placing the aforesaid control--member-moving-mcans in condition to function and for simultaneously placing said shoe in co-operative relation with said track.

8. In a safety mine hoist having a control member to effect hoist-stopping. an actuator for said control member, speedresponsive means for moving said actuator to ward said control member proportionately with hoist speed increase, a lever connected with said control member and h aving a, movably mounted shoe. and a driven table having a cam co-operable with said shoe for moving the lever to shift the control mem ber toward the actuator during the nearlanding movement of the hoist; means independent of said speed-responsive means for moving said actuator toward said con trol member, means embodying a track on the aforesaid table and a coacting shoe, for holding said independent actuator-moving means against action until the near-landing movement of the hoist takes place, and means for simultaneously disposing the first named shoe in the path of its co-operating cam and placing the second named shoe in co-operative relation with the aforesaid track.

9. In a safety mine hoist having a control member to effect hoist-stopping. an actuator for said control member. speed-responsive means for moving said actuator toward said control member proportionately with hoist speed increase, a lever connected with said control member and having a movably mounted shoe, and a driven table having a cam co-operable with said shoe for moving the lever to shift the control member toward the actuator during the near-landing movement of the hoist; a second lever connected operatively with the actuator and provided with means urging it to move in a direction to shift said actuator toward the control member, a second shoe on said second lever, a track on the aforesaid table to engage said second shoe and hold said second lever against action until near-landing movement of the hoist takes place, and means for simultaneously disposing the first named shoe in the path of its co-operating cam and disposing the second shoe in co-operative relation with said track.

10. In a safety mine hoist having a control member to effect hoist-stopping, an actuator for said control member, speed-responsive means for moving said actuator toward said control member proportionately with hoist speed increase, a lever connected with said control member and having a movably mounted shoe, and a driven table having a cam co-operable with said shoe for moving the l.ever to shift the control member toward the actuator during the nearlanding movement of the hoist; a second lever connected operatively with the actuator and provided with means urging it to move in a direction to shift said actuator toward the control member, a second shoe on said second lever, a track on the aforesaid table to engage said second shoe and hold said second lever against action until near-landing movement of the hoist takes place, a bell crank having operative con nection with the fir-st named shoe for disposing it in the path of its co-opcrating cam, and suspending means connected to said bell crank, said suspending means supporting said second lever in an inoperative position but serving to free the same and place it under control of its shoe and the coacting track when the bell crank is moved to dispose the first named shoe in the path of its co-operating cam.

In testimony whereof we have hereunto afiixed our signatures.

THOMAS H. COOK. DONALD N. SMITH. 

